Ignorance problem

I am loving a girl who is friend of my girl best friend. After few days chatting she understand my intention on her and she blocked me😔😔.. We used to chat mostly and happily for long time..
After few months she unblocked me☺☺☺☺... Becoz i became more emotional and my frnd told to her about me..
But mostly she is ignoring me😔😔😔.. She is seeing my messages and sometimes not even giving replies😔😔😔... Or giving replies very lately..
And sometimes telling "bye" Very fastly😔😔😔...
I don't know why she is ignoring me..
Plzz... Help me friends.. 😔😔😔😔